JPS5811283B2 - Cooling conveyance equipment for hot rolled wire rods - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to cooling conveyance equipment for cooling a hot-rolled wire rod formed into a continuous ring shape while conveying it.

Various methods for cooling a wire rod immediately after hot rolling have already been employed, and many different apparatuses for carrying out these methods are now well known.

What determines the properties of a wire rod product, such as the surface texture and uniformity of the microscopic structure of a hot rolled wire rod, mostly depends on the cooling method (uniformity) and cooling rate in cooling the wire rod after rolling.

However, in most conventional methods, the wire rods are arranged in a ring shape as open as possible and cooled by air, but this method has insufficient cooling uniformity and cooling rate, resulting in low carbon steel wire rods and small diameter wire rods being air-cooled. Although there is no problem in heat treating hard steel wire rods, there is a recent trend toward higher tensile strength and larger diameter hard steel wire rods manufactured for wire drawing, which requires particularly uniform quality. Therefore, the method using air cooling lacks cooling capacity and the effect of heat treatment (patenting) is insufficient.

For this reason, recent efforts have been made to increase tension and increase diameter by methods such as cooling by mixing mist with air or cooling in a salt bath.

However, there is a method of cooling by mixing mist with air,
The method of cooling in a salt bath has the disadvantage that low carbon steel wire rods and small diameter hard steel wire rods are not cooled properly.

In addition, the conventional cooling equipment has the disadvantage that each of the above-mentioned cooling methods is installed on a line directly connected to the rolling mill, so a huge amount of equipment including a rolling mill is required for each cooling method.The purpose of the present invention is to The purpose of the present invention is to provide cooling conveyance equipment that eliminates the drawbacks of conventional equipment and enables cooling heat treatment of wire rods of all sizes and steel types after hot rolling.

That is, the present invention provides a cooling conveyance equipment that cools a continuous ring-shaped wire while conveying it, in which a carriage movable in a direction perpendicular to the direction of conveyance of the ring-shaped wire is disposed, and an air-cooled conveyance system is provided on the moving carriage. The device and a liquid bath cooling conveyance device consisting of a cooling tank and a cleaning device are placed parallel to each other so as to be parallel to the conveyance direction of the ring-shaped wire rod, and the ring-shaped wire rod is moved between the air cooling conveyance device and the liquid bath by the movement of the trolley. This is a cooling conveyance facility for hot rolled wire rods, characterized in that the hot rolled wire rod is configured to pass through any one of the cooling conveyance devices.

Next, the configuration of the equipment of the present invention will be explained in detail with reference to embodiments shown in the drawings.

FIG. 1 is a plan view showing an embodiment of the cooling conveyance equipment of the present invention, and FIG. 2 is a sectional view taken along the line AA in FIG. 1, showing the air cooling conveyance apparatus.

FIG. 3 is a sectional view taken along line BB in FIG. 1, showing the liquid bath cooling and conveying device.

FIG. 4 is a sectional view taken along line C-- in FIG. 1.

In the figure, 2 is an inlet conveyor that conveys the ring-shaped wire S formed by the winder 1, and this conveyor 2 is connected to the air cooling conveyance device 3 of the cooling conveyance device 28 provided on the downstream side or the liquid bath cooling conveyance device. It has a mechanism that changes the horizontal angle according to the inclination of the wire rod 10, and improves the transportability of the ring-shaped wire rod S.

Reference numeral 28 denotes a cooling conveyance device, which is composed of an air cooling conveyance device 3 and a liquid bath cooling conveyance device 10, which are provided in parallel on the moving carriage 20.

Reference numeral 20 denotes a movable trolley, on the upper surface of which is placed the air cooling conveyance device 3 and the liquid bath cooling conveyance device in parallel on the downstream side of the inlet conveyor 2, and is installed on the floor in a direction perpendicular to the conveyance direction. It is installed to be movable on several rails 21, and this moving trolley 20 is equipped with a drive device and a fixing device for fixed position stopping (not shown), making it easy to select either of the above two types of cooling conveyance devices. It is designed to be able to match the conveyor line.

3 is on the downstream side of the inlet conveyor 2, and while the ring-shaped wire S from the inlet conveyor 2 is being conveyed by another conveyor 4 on a movable cart 20 that is movable in a direction orthogonal to the conveyance direction of the inlet conveyor 2. , an air cooling conveyance device having a means for cooling the ring-shaped wire S by blowing air thereon. A nozzle 6 that blows cold air onto the ring-shaped wire S that is mainly provided below and is being conveyed, a distribution box 7 that evenly distributes the cold air to the nozzle 6, and a duct that sends the cold air to the distribution box 7. 8, and a blower 9 connected to the duct 8 and blowing a large amount of cold air.

Reference numeral 10 denotes a liquid bath cooling conveying device provided on the above-mentioned moving cart 20 in parallel with the air cooling conveying device 3.
A conveyor 11 that receives and conveys the ring-shaped wire S, a cooling tank 12 that liquid-cools the ring-shaped wire S during the conveyance of the conveyor 11, and a cooling tank 12 that liquid-cools the ring-shaped wire S after being liquid-cooled on the downstream side of the cooling tank 12 (right side in the drawing). and a cleaning device 13 for cleaning.

The conveyor 11 of the liquid bath cooling and conveying device 10 is a one-roller type conveyor, as shown in FIG.
The parts of the cooling tank 12 and cleaning tank 15 that are immersed in the liquid are the cone conveyor 22, which is a cone-shaped roller inserted into the liquid tank at an angle, and the other part is a horizontal flat roll system. The ring-shaped wire S received from the inlet conveyor 2 is conveyed to the outlet conveyor 5 via the cooling tank 12 and the cleaning device 13.

As shown in FIG. 4, the cone conveyor 22 has a cone 25' fixed to the lower end of the roller shaft 24, and a cone-shaped roller 25 connected to the drive device 27 is connected to the upper end of the roller shaft 24 for cooling. A large number of cone-shaped rollers 25 are arranged in the transport direction of the tank 12 or the cleaning tank 15, and the roller shaft 24 of each cone-shaped roller 25 is supported by a bearing 26 fixed to the side surface of the cooling tank 12 or the cleaning tank 15.

Although the driving device 27 for the conical roller 25 uses a worm gear system using an electric motor as shown in the figure, the present invention is not limited to this, and a driving device such as a bevel gear system may be used.

The driving form may be either batch drive by a line shaft or individual drive for each roller, but a batch drive system by a line shaft as shown in the drawing is preferable in terms of equipment space and speed adjustment of the entire conveyor.

Further, cone-shaped rollers 25 are provided at the inclined parts of the cone conveyor 22 on the inlet and outlet sides of the cooling tank 12 and the cleaning tank 15.
can be raised and lowered independently, and consideration is given to ensure smooth conveyance depending on the condition of the ring-shaped wire S.

Further, the tip of the cone-shaped roller 25 has shallow irregularities that serve as a rotary impeller, and is designed to stir the cooling liquid or cleaning liquid to improve the cooling effect or cleaning effect.

The tank 12 is for storing a cooling liquid (for example, hot water mixed with a salt surfactant such as calcium chloride) for liquid cooling the ring-shaped wire S. A liquid temperature control device is provided to control the cooling liquid to a desired temperature.

The cleaning device 13 includes a pre-cleaning spray 14 for cleaning the ring-shaped wire S after cooling, and a cleaning tank 1 for storing cleaning liquid.
5 and a cleaning spray 16 for further cleaning the ring-shaped wire S after leaving the cleaning tank, and the rear part of the cleaning spray 16 is configured to spray air and drain water.

Reference numeral 5 denotes an output conveyor, which is located on the downstream side (right side in the drawing) of the cooling conveyance device 28, and is connected to the conveyor 4 of the air cooling conveyance device 3 or the liquid bath cooling conveyance device 1.
It receives the cooled ring-shaped wire S from the conveyor 11 of No. 0 and conveys it to the converging device 19.

Reference numeral 19 denotes a converging device, which converges the ring-shaped wire S from the output conveyor 5 into a coil shape.

Note that a guide tube 18 is provided at the transfer portion of the ring-shaped wire S between the output conveyor 5 and the converging device 19 so that the ring-shaped wire S can be transferred smoothly.

Next, the operation of the equipment of the present invention will be explained with reference to the embodiment shown in the drawings.

Items that are cooled at a relatively slow cooling rate, such as low-carbon steel wire rods and small-diameter hard steel wire rods, are cooled by the air cooling conveyor 3, and items that are heat-treated at a relatively fast cooling rate, such as large-diameter high-tensile wire rods. For this purpose, cooling is performed using the liquid bath cooling and conveying device 10.

When cooling with the air cooling conveyance device 3, the air cooling conveyance device 3 of the cooling conveyance device 28 is moved and fixed in advance to a position directly connected to the conveyance line using the movable cart 20 as shown in FIG. The wire rod S, which has been rolled and formed into a continuous ring shape by the winder 1, is received from the inlet conveyor 2, and while being conveyed by the conveyor 4, cold air sent from the blower 9 is sent mainly from the lower part of the ring-shaped wire rod S. Spray and cool.

In addition, when cooling is performed using the liquid bath cooling conveyor 10, the liquid bath cooling conveyor 10 of the cooling conveyor 28 is moved and fixed in advance to a position directly connected to the conveyor line by the movable trolley 20, and the inlet conveyor 2 is moved to a position directly connected to the conveyor line. As shown in the figure, the wire S, which has been hot-rolled and formed into a continuous ring shape by the winder 1, is tilted so that the ring-shaped wire S is conveyed smoothly, and is conveyed by the entrance conveyor 2 to the conveyor 11. Transfer.

Conveyor 11 (The transferred ring-shaped wire S is in the cooling tank 1
After being liquid-cooled with a cooling liquid controlled to an appropriate temperature in step 2, it is cleaned by the pre-washing spray 14 of the cleaning device 13, the cleaning liquid in the cleaning tank 15, and the cleaning spray 16, and then transferred to the exit conveyor 5.

The ring-shaped wire S transferred to the exit conveyor 5 is transferred to the converging device 19 via the guide tube 18 and converged.

In this embodiment, a cone conveyor was used as the conveyor of the liquid bath cooling and conveying device of the equipment of the present invention.
The lower part of the roll shaft 24 and the cone 25' are immersed in the liquid, and the bearing 26 and drive device 27 are placed above the liquid level, so the liquid can damage the bearing 26 and drive device 27 by oxidation, corrosion, etc. Since the shaft does not penetrate the side of the liquid tank, there is no need for seals to prevent liquid leakage, and the conveyor has a long equipment life and is easy to maintain, making it a highly convenient conveyor for industrial installation. It is from.

However, the conveyor of the liquid bath cooling conveyance device of the present invention is not limited to the cone conveyor as in this embodiment.
It is also possible to use a chain conveyor or a roller conveyor, such as the conveyor 4 of the air-cooled conveyor 3.

Since the present invention is a cooling conveyance facility having the above configuration,
It is possible to perform cooling heat treatment on wire rods of all sizes and steel types after hot rolling under the required conditions, and unlike conventional equipment, it does not require huge equipment including rolling mills for each cooling method. The cooling conveyance equipment of the present invention is industrially highly effective because it requires only one taker and convergence device.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the cooling conveyance equipment of the present invention, and FIG. 2 is a sectional view taken along the line AA in FIG. 1, showing the air cooling conveyance apparatus. FIG. 3 is a sectional view taken along the line B--B in FIG. 1, showing the liquid bath cooling and conveying device. FIG. 4 is a sectional view taken along the line CC in FIG. 1. 1... Winder, 2... Entry side conveyor, 3... Air cooling conveyance device, 4... Conveyor, 5... Output side conveyor,
10...Liquid bath cooling conveyance device, 11...Conveyor, 12
...Cooling tank, 13...Cleaning device, 19...Focusing device, 2
0...Moving trolley, 28...Cooling conveyance device.

Claims (1)

[Claims] 1. In a cooling conveyance facility that cools a continuous ring-shaped wire while conveying it, a carriage movable in a direction perpendicular to the conveyance direction of the ring-shaped wire is disposed, and an air cooling conveyance device is mounted on the moving carriage, A liquid bath cooling conveying device consisting of a cooling tank and a cleaning device are placed in parallel to each other so as to be parallel to the conveying direction of the ring-shaped wire rod, and the movement of the cart moves the ring-shaped wire rod to the air cooling conveying device and the liquid bath cooling conveying device. 1. Cooling conveyance equipment for hot-rolled wire, characterized in that it is configured to pass through any one of the following.